I think my 8 week old chicks may have this. I had some problems with them failing (listless, lose weight and some die). They never had respiratory symptoms, but so far the only thing that seems to have remotely worked is Duramycin-10. I had also tried Wazine - but never saw any worms. I have mostly Orps from a hatchery, but I got some mixed chicks from a local breeder at the same time. Initially only the local breeder's birds (but not all of them) came down with it, but over time, it has also affected the hatchery birds. Questions: Is this the only type of thing that Duramycin would fix? I see all sorts of things saying that birds with this are condemned at processing. Is it likely that I won't be able to eat these birds - will it be obvious at processing (I've never processed before, but could beg a favor from a neighbor who has to examine guts if necessary. What is the danger - why are they condemned? It looks like this is now permanently in my flock? Help?